SE9101397D0 - PROCEDURE AND DEVICE TO TRANSFER AN OPTICAL DATA SIGNAL FROM A MULTIMOD FIBER TO A SIMILAR SIGNAL INTO A SINGLE MODIFIER - Google Patents
PROCEDURE AND DEVICE TO TRANSFER AN OPTICAL DATA SIGNAL FROM A MULTIMOD FIBER TO A SIMILAR SIGNAL INTO A SINGLE MODIFIERInfo
- Publication number
- SE9101397D0 SE9101397D0 SE9101397A SE9101397A SE9101397D0 SE 9101397 D0 SE9101397 D0 SE 9101397D0 SE 9101397 A SE9101397 A SE 9101397A SE 9101397 A SE9101397 A SE 9101397A SE 9101397 D0 SE9101397 D0 SE 9101397D0
- Authority
- SE
- Sweden
- Prior art keywords
- laser
- signal
- pct
- pass filter
- stored
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 239000003607 modifier Substances 0.000 title 1
- 239000000835 fiber Substances 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
PCT No. PCT/SE92/00285 Sec. 371 Date Oct. 28, 1993 Sec. 102(e) Date Oct. 28, 1993 PCT Filed Apr. 29, 1992 PCT Pub. No. WO92/20172 PCT Pub. Date Nov. 12, 1992.The present invention discloses a method and a device for conversion of an optical data signal from a multimode fibre (1), which except for normal data signals may contain interruptions and an overmodulated low frequency signal, to a corresponding signal which is transmitted further into a single mode fibre (8) by a laser (7). An electric signal from an optical receiver (2) partly directly and partly through a low pass filter (4) is coupled to a comparator (5) the output of which modulates the laser (7). Upon detection of an optical interruption the low pass filter (4) is influenced such that its output signal is stored in a memory device, and the laser is influenced by diversion of the laser current, simultaneously as an analogue value in the control loop of the laser is stored. When the interruption ends both the laser transmitter (7) and the low pass filter (4) continue to operate as before on the basis of their stored analogue values.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9101397A SE9101397L (en) | 1991-05-08 | 1991-05-08 | PROCEDURE AND DEVICE TO TRANSFER AN OPTICAL DATA SIGNAL FROM A MULTIMOD FIBER TO A SIMILAR SIGNAL INTO A SINGLE MODIFIER |
US08/137,162 US5444563A (en) | 1991-05-08 | 1992-04-29 | Method and arrangement to convert an optical data signal from a multi mode fibre to a corresponding signal into a signal mode fibre |
PCT/SE1992/000285 WO1992020172A1 (en) | 1991-05-08 | 1992-04-29 | Method and arrangement to convert an optical data signal from a multimode fibre to a corresponding signal into a signal mode fibre |
DE69226635T DE69226635T2 (en) | 1991-05-08 | 1992-04-29 | METHOD AND DEVICE FOR CONVERTING AN OPTICAL DATA SIGNAL FROM A MULTIMODE FIBER TO A CORRESPONDING SIGNAL IN A MONOMODE FIBER |
EP92909506A EP0583304B1 (en) | 1991-05-08 | 1992-04-29 | Method and arrangement to convert an optical data signal from a multimode fibre to a corresponding signal into a single mode fibre |
AU17564/92A AU1756492A (en) | 1991-05-08 | 1992-04-29 | Method and arrangement to convert an optical data signal from a multimode fibre to a corresponding signal into a signal mode fibre |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9101397A SE9101397L (en) | 1991-05-08 | 1991-05-08 | PROCEDURE AND DEVICE TO TRANSFER AN OPTICAL DATA SIGNAL FROM A MULTIMOD FIBER TO A SIMILAR SIGNAL INTO A SINGLE MODIFIER |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9101397D0 true SE9101397D0 (en) | 1991-05-08 |
SE467762B SE467762B (en) | 1992-09-07 |
SE9101397L SE9101397L (en) | 1992-09-07 |
Family
ID=20382682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9101397A SE9101397L (en) | 1991-05-08 | 1991-05-08 | PROCEDURE AND DEVICE TO TRANSFER AN OPTICAL DATA SIGNAL FROM A MULTIMOD FIBER TO A SIMILAR SIGNAL INTO A SINGLE MODIFIER |
Country Status (6)
Country | Link |
---|---|
US (1) | US5444563A (en) |
EP (1) | EP0583304B1 (en) |
AU (1) | AU1756492A (en) |
DE (1) | DE69226635T2 (en) |
SE (1) | SE9101397L (en) |
WO (1) | WO1992020172A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3092521B2 (en) * | 1996-08-26 | 2000-09-25 | 日本電気株式会社 | Communication network node device, optical communication network node device, signal monitoring method, and communication network |
US10439733B2 (en) * | 2014-01-13 | 2019-10-08 | The Johns Hopkins University | Fiber optic circuit breaker |
CN110943781B (en) * | 2019-11-27 | 2023-05-16 | 深圳市联洲国际技术有限公司 | Mode conversion equipment of single mode optical fiber and multimode optical fiber |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4257125A (en) * | 1979-05-01 | 1981-03-17 | The Singer Company | Receiver for unipolar Manchester fiber optics signals |
GB8429921D0 (en) * | 1984-11-27 | 1985-01-03 | British Telecomm | Flexible regenerator |
JPH07112173B2 (en) * | 1986-08-26 | 1995-11-29 | 日本電気株式会社 | Light modulation circuit |
JPH0834454B2 (en) * | 1990-03-01 | 1996-03-29 | 国際電信電話株式会社 | Optical repeater monitoring system |
-
1991
- 1991-05-08 SE SE9101397A patent/SE9101397L/en not_active IP Right Cessation
-
1992
- 1992-04-29 WO PCT/SE1992/000285 patent/WO1992020172A1/en active IP Right Grant
- 1992-04-29 US US08/137,162 patent/US5444563A/en not_active Expired - Lifetime
- 1992-04-29 AU AU17564/92A patent/AU1756492A/en not_active Abandoned
- 1992-04-29 DE DE69226635T patent/DE69226635T2/en not_active Expired - Lifetime
- 1992-04-29 EP EP92909506A patent/EP0583304B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
SE467762B (en) | 1992-09-07 |
WO1992020172A1 (en) | 1992-11-12 |
AU1756492A (en) | 1992-12-21 |
SE9101397L (en) | 1992-09-07 |
EP0583304B1 (en) | 1998-08-12 |
DE69226635T2 (en) | 1999-04-08 |
EP0583304A1 (en) | 1994-02-23 |
DE69226635D1 (en) | 1998-09-17 |
US5444563A (en) | 1995-08-22 |
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